129564941 has 4 divisors (see below), whose sum is σ = 141343584. Its totient is φ = 117786300.

The previous prime is 129564931. The next prime is 129564943. The reversal of 129564941 is 149465921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129564941 - 2¹⁴ = 129548557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129564943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5889305 + ... + 5889326.

It is an arithmetic number, because the mean of its divisors is an integer number (35335896).

Almost surely, 2^129564941 is an apocalyptic number.

129564941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129564941 is a deficient number, since it is larger than the sum of its proper divisors (11778643).

129564941 is a wasteful number, since it uses less digits than its factorization.

129564941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11778642.

The product of its digits is 77760, while the sum is 41.

The square root of 129564941 is about 11382.6596628380. The cubic root of 129564941 is about 506.0139624949.

The spelling of 129564941 in words is "one hundred twenty-nine million, five hundred sixty-four thousand, nine hundred forty-one".